12129472 has 14 divisors (see below), whose sum is σ = 24069548. Its totient is φ = 6064704.

The previous prime is 12129419. The next prime is 12129473. The reversal of 12129472 is 27492121.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 12129472.

It is not an unprimeable number, because it can be changed into a prime (12129473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94698 + ... + 94825.

Almost surely, 2^12129472 is an apocalyptic number.

It is an amenable number.

12129472 is a deficient number, since it is larger than the sum of its proper divisors (11940076).

12129472 is an equidigital number, since it uses as much as digits as its factorization.

12129472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189535 (or 189525 counting only the distinct ones).

The product of its digits is 2016, while the sum is 28.

The square root of 12129472 is about 3482.7391518746. The cubic root of 12129472 is about 229.7632851282.

The spelling of 12129472 in words is "twelve million, one hundred twenty-nine thousand, four hundred seventy-two".